If you want to polish, you must first ensure that the smooth surface of jewelry remains flat, and only flat areas can be polished.

Secondly, when polishing, you'd better use some detergent in your hand to avoid the place scraped by the scraper from being broken again because of your dirty hands.

Some polishing knives used in factories also use agate knives, but most of them use stainless steel knives. The front end of this knife is very thin, a bit like a brush, and the tip of the front end can be put into the petals for polishing.

There is also an auxiliary electrolytic explosion color used for cleaning.